Pcos and birth control?

i have PCOS. My doctor put me on Birth control to help regulate myself, and i did three packs of portia birth control. I ended up getting pregnant, which was great, but i lost the baby at 9 weeks. This was my first pregnancy so they wont test me until i miscarry again. Is my pcos the reason i miscarried? i dont know, but we are starting to try again now. i was ttc for 3 years and the pills helped me. Now i took yasmin for a month and ttc again. help me plz.